html5 canvas and emberjs view

问题

I'd like to add some drawing functionality in my ember based application. I plan to use the html5 canvas element. Basically, in my DOM I have

<canvas id="my-canvas">

And I need to get my canvas context when the DOM is loaded with

var c = document.getElementById('my-canvas')
// ... do something with c

If the canvas is represented with an Ember.View :

App.Canvas = Em.View.extend({
 tagName: 'canvas'
})

What is the equivalent of document.getElementById?

回答1:

var view = App.Canvas.create().append();
var viewContext = Ember.get(view, 'element');

viewContext will hold what you need.

回答2:

From the canvas context, you could use the $() method:

this.$('#id')

which provides a JQuery-flavored way to access elements.

来源：https://stackoverflow.com/questions/9890709/html5-canvas-and-emberjs-view